#define _CRT_SECURE_NO_WARNINGS	

BTNode* Find_XNode_Tree(BTNode* root, DataType x)
{
	if (root == NULL)
		return NULL;
	if (root->data == x)
		return root;
	BTNode* left = Find_XNode_Tree(root->left, x);
	if (left)
		return left;
	BTNode* right = Find_XNode_Tree(root->right, x);
	if (right)
		return right;
	return NULL;
}